用于读写参数。用于读写配置文件

1.可以写入指定关键词等于数值及字符串

2.可以读指定文件里指定关键词的值，如未有关键词可附带初值-For reading and writing parameters. Used to read and write configuration files can be written equal to a numeric string specified keywords can read the specified file to specify the value of the keyword, if not keywords can be included with the initial value